CA1040268A - Magnetic field sensing apparatus - Google Patents

Magnetic field sensing apparatus

Info

Publication number
CA1040268A
CA1040268A CA232,238A CA232238A CA1040268A CA 1040268 A CA1040268 A CA 1040268A CA 232238 A CA232238 A CA 232238A CA 1040268 A CA1040268 A CA 1040268A
Authority
CA
Canada
Prior art keywords
generator
output signal
magnet
magnetoresistive element
strips
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA232,238A
Other languages
English (en)
French (fr)
Other versions
CA232238S (en
Inventor
Yoshimi Makino
Hiroyuki Ookubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of CA1040268A publication Critical patent/CA1040268A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/9517—Proximity switches using a magnetic detector using galvanomagnetic devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
CA232,238A 1974-07-26 1975-07-25 Magnetic field sensing apparatus Expired CA1040268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1974089883U JPS576962Y2 (en]) 1974-07-26 1974-07-26

Publications (1)

Publication Number Publication Date
CA1040268A true CA1040268A (en) 1978-10-10

Family

ID=13983153

Family Applications (1)

Application Number Title Priority Date Filing Date
CA232,238A Expired CA1040268A (en) 1974-07-26 1975-07-25 Magnetic field sensing apparatus

Country Status (8)

Country Link
US (1) US4079360A (en])
JP (1) JPS576962Y2 (en])
AT (1) AT343209B (en])
CA (1) CA1040268A (en])
DE (1) DE2532981B2 (en])
FR (1) FR2296855A1 (en])
GB (1) GB1495320A (en])
NL (1) NL188120C (en])

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US5552778A (en) * 1994-11-23 1996-09-03 International Business Machines Corporation Multibit bimorph magnetic tags using acoustic or magnetic interrogation for identification of an object coupled thereto
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JP5691594B2 (ja) * 2011-02-09 2015-04-01 富士ゼロックス株式会社 検知装置および処理システム
US20120229128A1 (en) * 2011-03-10 2012-09-13 Armin Satz Magnetic Field Sensor
US10495699B2 (en) 2013-07-19 2019-12-03 Allegro Microsystems, Llc Methods and apparatus for magnetic sensor having an integrated coil or magnet to detect a non-ferromagnetic target
US9810519B2 (en) * 2013-07-19 2017-11-07 Allegro Microsystems, Llc Arrangements for magnetic field sensors that act as tooth detectors
US10145908B2 (en) 2013-07-19 2018-12-04 Allegro Microsystems, Llc Method and apparatus for magnetic sensor producing a changing magnetic field
JP6406531B2 (ja) * 2014-08-26 2018-10-17 Tdk株式会社 磁気式位置検出装置
US9823092B2 (en) 2014-10-31 2017-11-21 Allegro Microsystems, Llc Magnetic field sensor providing a movement detector
US10712403B2 (en) 2014-10-31 2020-07-14 Allegro Microsystems, Llc Magnetic field sensor and electronic circuit that pass amplifier current through a magnetoresistance element
US10260905B2 (en) 2016-06-08 2019-04-16 Allegro Microsystems, Llc Arrangements for magnetic field sensors to cancel offset variations
US10041810B2 (en) 2016-06-08 2018-08-07 Allegro Microsystems, Llc Arrangements for magnetic field sensors that act as movement detectors
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WO2018199068A1 (ja) * 2017-04-25 2018-11-01 コニカミノルタ株式会社 磁気センサー
JP6787260B2 (ja) * 2017-06-14 2020-11-18 株式会社デンソー ポジションセンサ
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US10866117B2 (en) 2018-03-01 2020-12-15 Allegro Microsystems, Llc Magnetic field influence during rotation movement of magnetic target
US11255700B2 (en) 2018-08-06 2022-02-22 Allegro Microsystems, Llc Magnetic field sensor
US10823586B2 (en) 2018-12-26 2020-11-03 Allegro Microsystems, Llc Magnetic field sensor having unequally spaced magnetic field sensing elements
US11237020B2 (en) 2019-11-14 2022-02-01 Allegro Microsystems, Llc Magnetic field sensor having two rows of magnetic field sensing elements for measuring an angle of rotation of a magnet
US11280637B2 (en) 2019-11-14 2022-03-22 Allegro Microsystems, Llc High performance magnetic angle sensor

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NL180552C (nl) 1972-10-11 1987-03-02 Ibm Magnetoresistieve leeskop.
JPS575067B2 (en]) * 1973-07-13 1982-01-28

Also Published As

Publication number Publication date
NL188120C (nl) 1992-04-01
JPS5118146U (en]) 1976-02-09
DE2532981A1 (de) 1976-02-05
GB1495320A (en) 1977-12-14
FR2296855B1 (en]) 1981-05-22
DE2532981B2 (de) 1977-03-24
JPS576962Y2 (en]) 1982-02-09
AT343209B (de) 1978-05-10
US4079360A (en) 1978-03-14
NL7508926A (nl) 1976-01-28
NL188120B (nl) 1991-11-01
ATA584875A (de) 1977-09-15
FR2296855A1 (fr) 1976-07-30

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